“Edit: So UE has announced the new update to the UERM, the UE Reference Remastered... 1 day after my review. Pretty ironic but it is what it is haha. So I guess this review may be more a tribute to the past than I had initially intended it to be as the UERM is now officially discontinued. The Story Behind the Name: ...” --Cotnijoe

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This is my very first pair of custom IEMs after trying almost all of the high end universal IEMs -- SE530, UE Super Fi 10, Etymotics etc. The sound of these UE11 Pros is superior in every way to all of the universal ones I had, but even more important they stay in my ear and provide a proper seal. Since my ear canals get very narrow, I found it very difficult to get any of my universals to...” --alyanm

“This is my first written review on Head-Fi, so please take everything with a grain of salt, but I am going for a detailed review here, and I intend on doing more in the future, so please feel free to comment on anything I can do to improve! Anyway, let's dive right in! A little about me: A little over a year ago, some switch flipped inside of me, and I discovered the...” --cvbcbcmv

“This is in my humble oppinion the very best bang for your buck custom in ear monitor on the whole market. For 250 british pounds you get a very nice piece of equipment, from very nice people too! The guys at cosmic ears care about their stuff being done properly and on time, they checked everything to be correct, from my ear canal impressions to colour, logos, letters, etc. They also come with...” --ardacer

“First of all I'd like to say the customs and the cable are both insane, the customs look incredible and the linum cable and connector beat the hell out of any other CIEM I've seen around.
Cosmic Ears list this as a jack of all trades monitor which I do agree with. I'm coming from a 4BA model to this 2BA and I've been pleasantly surprised by the sound. I haven't had these a week yet so...” --daftpolecat

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To start, I purchased these for two reasons. I am a live audio engineer, so I use these for mixing monitors and as my personal monitors when I sing Tenor as part of my group.
These have two speakers per ear. Low/Mid and High. 119db @1mw with an impendance of 21 ohms which means your iphone can drive these quite poorly.
My initial View:
I have been...” --hagosrush

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i was excited over my first custom IEM's ever, I was also excited because i've been a sucker for the Ultimate Ears sound for a long time. Now I know that Logitech is now in charge of UE, but I still felt like these would be very musical CIEM's, as the Ultimate Ears commercial line is so well known for their musicality factor. After a month of waiting due to having to get impressions, and then...” --IEMagnet01

“The HY3 is a three-way, three-driver hybrid custom in-ear monitor from Sweden-based Cosmic Ears. It utilizes a dynamic driver for the bass and twin balanced armature drivers for the midrange and treble, which used to be a very rare configuration, although hybrids have increased in popularity over the past year. The bass unit looks to be around 8mm in diameter and has its own sound bore. The two...” --blueangel2323

The HY2 combines a dynamic driver for lows and a balanced armature for the mids and highs. This dynamic driver also delivers an increased soundstage. The HY2 is a great sounding monitor for those looking for something a little different by combing the 2 driver technologies.
Twin hybrid – 1 for lows, 1 for mids and highs
Full sized medical grade hard acrylic shell
Various...

For over 17 years we’ve been crafting the world’s finest custom in-ear monitors for discerning music listeners and industry pros. Traditionally, the “custom” in “custom in-ear monitors” refers to personally molded shells that fit you and only you. However, with the UE Personal Reference Monitors we’re taking customization to a whole new level.
As the...